Update square-root description.md

exercises/square-root/instructions.md

@@ -1,16 +1,16 @@
 # Instructions
 
-Your task is to implement a calculation of the square root of a given number.
+Your task is to calculate the square root of a given number.
 
 - Try to avoid using the pre-existing math libraries of your language.
 - As input you’ll be given a positive whole number, i.e. 1, 2, 3, 4…
 - You also only need to output a positive whole number.
 
-Examples of some approaches you could consider are:
+Here are some approaches you could use.
 
-- Linear or binary search for a number that gives the input number when squared
-- Successive approximation using Newton's or Heron's method
-- Calculating one digit at a time or one bit at a time
+- Linear or binary search for a number that gives the input number when squared.
+- Successive approximation using Newton's or Heron's method.
+- Calculating one digit at a time or one bit at a time.
 
 You can check out the Wikipedia pages on [integer square root][integer-square-root] and [methods of computing square roots][computing-square-roots] to help with choosing a method of calculation.
 

exercises/square-root/introduction.md

@@ -4,6 +4,7 @@ We are launching a deep space exploration rocket and we need a way to make sure
 
 The first step in our coordinate calculation involves taking a number as input and finding another number which multiplied by itself will equal our input number, or in other words, finding the square root of our input number.
 
-Because the journey will be very long, we had to make our rocket’s onboard computer very power efficient so it wouldn’t drain the batteries.
-Unfortunately that means that we can’t rely on fancy math libraries and functions, as they would take more power.
+The journey will be very long.
+To make the batteries last as long as possible, we had to make our rocket’s onboard computer very power efficient.
+Unfortunately that means that we can’t rely on fancy math libraries and functions, as they use more power.
 Instead we want to calculate or approximate the square root directly.